Motive cylinder.



PATENTED JAN. 31, 1905.

W. KENNEDY.

MUTIVE CYLINDER.

APPLICATION 11.31) OUT. 8, 1900.

WITNESSES.

'Wwwl/ 43,68 4i 7 let-ports, of the cylinder, and 12 is the inlet UNITED STATES Patented January 31, 1905.

PATENT OFFICE.

MOTIVE CYLINDER.

SPECIFICATION formingpart of Letters Patent No. 781,148, dated January 31, 1905.

' Application filed October 8,1900. Serial No. 32,378.

To (ZZZ whom, it may concern:

Be it known that I, WALTER KENNEDY, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Motive Cylinders,

of which the following is a full, clear and.

exact description, reference being, had to the accompanying drawings, forming part of this specification, in which Figure 1 is a sectional side elevation showing my improved motive cylinder and connections, and Fig. 2 is a broken detail show- .ing the means for regulating the cushioning action. I

My invention relates to the arrangement and connections of small motive cylindersfor actuating elements such as valves, and more particularly to those for actuating blowing' inder having piston 3, whose piston-rod tmay be connected tothe valve or other device to be actuated. A valve-chamber 5 is preferably cast integral with thernotive cylinder and extends along one side and parallel therewith- This valve-casing is provided with a cylindrical bore in which moves a hollow tubular valve 6. This valve is open at both ends and at its upper end is connected by integral bars 7 to the plunger 8, which constitutes the upper part of the valve, and is connected to the actuating-link 9. h

1O 10 are the inlet-ports, and 11 11 the outpipe for the fuel-supply, which enters the lower end of the valve-casing. This inlet-pipe is preferably provided with a regulating-valve 13, by which the inlet-pressure may be adjusted as desired. The outlet-valve 14:,leading from the valve-casing,'is preferably provided with a spring 15, which is compressed when the valve is opened and the pressure of which leads to the exhaust-pipe 14'.

. area of these holes is regulated by screw plugs 19, so that by turning the plugs the cushioning action may be regulated as desired.

In order to prevent the condensation. in the cylinder from leaking through the s'tuflingbox and passing along the piston-rod into the wind-box, whence it would be carried with the air to the blast-furnace or other point where the air is utilized, Iprovide a stufiingbox 20, with separated metallic rings 21, held apart by spacing-bars 22, these rings being placedbetween two sets of compressible packings23. An open chamber is thus formed between the packings, from which a drain-pipe 24 Any leakage of steam or water through the packing will thus be directed into the exhaust, and I pre-' fer to use this same device upon the upper part of the valve, as shown at 25, a pipe 26 leading from the water-space to the exhaustpipe. In order to relieve the lower end of ,the valve-casing from the water of condensation which may collect therein, I provide a small hole in its lower end, in which a valve 27 may seat when forced downwardly by the steam-pressure against the action of a spring 28, which presses upon an upper disk portion 29 of the valve and normally holds it open. A pipe 30 leads from the hole to the pipe 2a and directs. the water of condensation to the exhaust.

In the operation of the device when the valve is moved into the position shown in Fig. 1 the entering fluid passes around the lower reduced portion of the valve through inlet-port 10 and forces the piston to the up-- per endof its stroke. The'fiuid in the'cylinder is exhausted through the outlet 11, and the remaining fluid will cushion the upper end of the stroke, gradually passing out through the holes 18 to the exhaust. Upon moving the valve upwardly a sufficient distance its lower end is uncovered and fluid passing through it enters the upper inlet-port and moves the piston in the opposite direction.

The advantages of my invention result from the packing connection for the drawing away of water and steam which leak thereinto and from the arrangement and connections of the operating-valve, which eheapen and simplify the construction and improve the operation, owing to the small clearance afl'orded.

Many changes may be made in the form and arrangement of the collecting-chamber and the packing, the valve and its arrangement, and the other parts without departing from my invention.

I claim 1. A double-acting motive cylinder having a piston therein, a tubular valve-casing having supply and exhaust ports connecting with the cylinder, an inclined series of outlet-holes near the end of the cylinder, and means for regulating the size of these outlets; substantially as described.

2. A double-acting motive cylinder having a tubular valve-casing, a hollow valve movable within the casing and arranged to control the supply and exhaust ports, said cylinder having an inclined series of holes near one end, and adjustable plugs arranged to control said holes; substantially as described.

3. A double-acting motive cylinder having a series of outlet-holes near each end, and adjustable plugs arranged to control the outlet through said holes and regulate the cushioning action; substantially as described.

In testimony whereof l have hereunto set my hand.

WALTER KENNEDY.

Witnesses:

H. M. GoRwIN, GEO. B. BLEMING. 

